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Blind detection method and equipment of physical downlink control channel

A technology of physical downlink control and blind detection, applied in power management, wireless communication, sustainable buildings, etc., can solve the problem of increasing terminal resource overhead and power consumption, and achieve the effect of saving resource overhead and power consumption

Active Publication Date: 2014-11-26
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, terminals need to perform blind detection in the entire search space of the PDCCH, and data equalization and decoding operations are required when performing blind detection for each logical search space. When the number of terminals is small, most logical search In fact, no PDCCH data is placed in the space, and according to the existing technology, data equalization and decoding operations are also required for the logical search space without PDCCH data, which increases the resource overhead and power consumption of the terminal

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  • Blind detection method and equipment of physical downlink control channel
  • Blind detection method and equipment of physical downlink control channel
  • Blind detection method and equipment of physical downlink control channel

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Embodiment 1

[0046]In this embodiment, the signals in the logical search space are extracted according to the index value of the logical search space, the extracted signals are arranged according to REG, and the total power value of the signal in each REG is calculated; the total power value of the REG Compared with the power value of the adjacent pilot signal, if the difference between the power value of the adjacent pilot signal and the total power value of the REG (that is, the power value of the adjacent pilot signal - the total power value of the REG) is greater than the set power threshold value, it is judged that the REG has no data;

[0047] If the number of REGs judged to have no data in the logical search space reaches M, where M is a positive integer greater than or equal to 1, it is determined that the possibility of PDCCH data of the terminal in the logical search space is low, and further needs Judging according to the channel conditions, when the channel conditions are good,...

Embodiment 2

[0062] In this embodiment, the signals in the logical search space are extracted according to the index value of the logical search space, the extracted signals are arranged according to REG, and the total power value of the signal in each REG is calculated; the total power value of the REG Compared with the set power threshold value, if the total power value is less than the power threshold value, it is judged that the REG has no data;

[0063] If the number of REGs judged to have no data in the logical search space reaches M, where M is a positive integer greater than or equal to 1, then it is judged that the possibility of PDCCH data of the terminal in the logical search space is low, and it is directly wrong Data in the logical search space is equalized and decoded, and the logical search space is skipped;

[0064] If the number of REGs judged to have no data is less than M in the logical search space, there may be PDCCH data of the terminal in the logical search space, an...

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Abstract

The embodiment of the invention discloses a blind detection method and equipment of a physical downlink control channel (PDCCH), relating to the technical field of wireless communication. The blind detection method and equipment of the physical downlink control channel are used for saving resource expense and power consumption of a terminal. The blind detection method comprises the following steps: the terminal extracts a signal of a physical resource position corresponding to a current logic searching space before carrying out the blind detection on the current logic searching space; the terminal determines whether PDCCH data of the terminal exists in the current logic searching space according to the power value of the extracted signal; and the terminal gives up the blind detection of the current logic searching space when PDCCH data of the terminal does not exist in the current logic searching space. By the blind detection method and equipment of the physical downlink control channel, disclosed by the invention, the resource expense and the power consumption of the terminal can be effectively saved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and equipment for blind detection of a physical downlink control channel. Background technique [0002] In the Long-Term Evolution (LTE) downlink system, according to the protocol, each terminal (UE) has dozens of logical search spaces in the control symbol area, and the base station (eNB) may place data in any of them However, in the prior art, since there is no signaling for notification, the UE does not know in which logical search space the base station sends the physical downlink control channel (PDCCH) data, so it needs to be transmitted in the entire PDCCH Blind detection in the search space. [0003] When the terminal performs blind detection on each logical search space, it needs to perform data equalization and decoding operations. Even if the base station does not send the PDCCH data of the terminal, dozens of data equalization and decoding operations ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L1/00H04W52/30
CPCY02B60/50
Inventor 彭振宇黄琛
Owner DATANG MOBILE COMM EQUIP CO LTD